Refereed articles

Regular peer-reviewed journal contributions

  • Aspects of open-flavour mesons in a comprehensive DSBSE study February 22, 2017
    arXiv:1702.06262Eur.Phys.J. A53 (2017) 213by: Hilger, T. (Graz U.) et al.Abstract: Open-flavour meson studies are the necessary completion to any comprehensive investigation of quarkonia. We extend recent studies of quarkonia in the Dyson-Schwinger-Bethe-Salpeter-equation approach to explore their results for all possible flavour combinations. Within the inh […]
  • Quasi-exotic open-flavor mesons May 12, 2016
    arXiv:1605.03464Eur.Phys.J. A53 (2017) 142by: Hilger, T. (Graz U.) et al.Abstract: Meson states with exotic quantum numbers arise naturally in a covariant bound-state framework in QCD. We investigate the consequences of shifting quark masses such that the states are no longer restricted to certain C-parities, but only by J^P. Then, a priori, one can no longe […]
  • Effects of a dressed quark-gluon vertex in vector heavy-light mesons and theory average of the $B_c^*$ meson mass February 17, 2016
    arXiv:1602.05002Phys.Rev. D93 (2016) 074010by: Gómez-Rocha, M. (ECT, Trento) et al.Abstract: We extend earlier investigations of heavy-light pseudoscalar mesons to the vector case, using a simple model in the context of the Dyson-Schwinger-Bethe-Salpeter approach. We investigate the effects of a dressed-quark-gluon vertex in a systematic fashion and illustra […]
  • Poincaré covariant pseudoscalar and scalar meson spectroscopy in Wigner-Weyl phase October 29, 2015
    arXiv:1510.08288Phys.Rev. D93 (2016) 054020by: Hilger, Thomas (Graz U.)Abstract: The coupled quark Dyson-Schwinger and meson Bethe-Salpeter equations in rainbow-ladder truncation for spin-0 mesons are solved in the Wigner-Weyl phase in the chiral limit and beyond, retaining only the ultraviolet finite terms of the phenomenologically most successful Maris-Tan […]
  • Light-quarkonium spectra and orbital-angular-momentum decomposition in a Bethe–Salpeter-equation approach August 31, 2015
    arXiv:1508.07183Eur.Phys.J. C77 (2017) 625by: Hilger, Thomas (Graz U.) et al.Abstract: We investigate the light-quarkonium spectrum using a covariant Dyson–Schwinger–Bethe–Salpeter-equation approach to QCD. We discuss splittings among as well as orbital angular momentum properties of various states in detail and analyze common features of mass splittings wit […]
  • Effects of a dressed quark-gluon vertex in pseudoscalar heavy-light mesons June 12, 2015
    arXiv:1506.03686Phys.Rev. D92 (2015) 054030by: Gomez-Rocha, M. (Vienna, OAW) et al.Abstract: Using a simple model in the context of the Dyson-Schwinger-Bethe-Salpeter approach, we investigate the effects of a dressed-quark-gluon vertex on pseudoscalar meson masses. In particular, we focus on the unequal-mass case and investigate heavy-light meson masses; in […]
  • Masses of $J^{PC} =1^{-+}$ exotic quarkonia in a Bethe-Salpeter-equation approach March 31, 2015
    arXiv:1503.08697Phys.Rev. D91 (2015) 114004by: Hilger, T. (Graz U.) et al.Abstract: We investigate the properties of mesons with the exotic J^PC = 1^-+ quantum numbers. Starting out from the light-quark domain, where the \pi_1 states are used as references, we predict the masses of analogous quarkonia for c\bar{c} and b\bar{b} configurations. We employ a cov […]
  • Wilson coefficients and four-quark condensates in QCD sum rules for medium modifications of $D$ mesons December 1, 2014
    arXiv:1411.7863Phys.Rev. C91 (2015) 015205by: Buchheim, Thomas (HZDR, Dresden) et al.Abstract: Wilson coefficients of light four-quark condensates in QCD sum rules are evaluated for pseudo-scalar $D$ mesons, thus, pushing the sum rules toward mass dimension six. Contrary to the situation for $\bar{q}q$ mesons the impact of the four-quark condensates for vacu […]
  • Spectra of heavy quarkonia in a Bethe-Salpeter-equation approach September 11, 2014
    arXiv:1409.3205Phys.Rev. D91 (2015) 034013by: Hilger, Thomas (Graz U.) et al.Abstract: In a covariant Bethe-Salpeter-equation approach and with a rainbow-ladder truncated model of quantum chromodynamics (QCD), we investigate the use of an effective interaction with the goal of reproducing QCD phenomenology. We extend previous studies and present results for […]
  • Analytical properties of the quark propagator from a truncated Dyson-Schwinger equation in complex Euclidean space December 11, 2013
    arXiv:1312.2721Phys.Rev. C89 (2014) 034005by: Dorkin, S.M. (Dubna, JINR) et al.Abstract: In view of the mass spectrum of heavy mesons in vacuum the analytical properties of the solutions of the truncated Dyson-Schwinger equatio for the quark propagator within the rainbow approximation are analysed in some detail. In Euclidean space, the quark propagator is n […]
  • In-medium operator product expansion for heavy-light-quark pseudoscalar mesons December 11, 2011
    arXiv:1112.2477Eur.Phys.J. A47 (2011) 151by: Zschocke, Sven (Dresden, Tech. U.) et al.Abstract: The operator product expansion (OPE) for heavy-light-quark pseudoscalar mesons (D-mesons and B-mesons) in medium is determined, both for a moving meson with respect to the surrounding medium as well as for a meson at rest. First of all, the OPE is given in terms o […]
  • Chiral QCD sum rules for open charm mesons September 5, 2011
    arXiv:1109.1229Phys.Rev. C84 (2011) 045202by: Hilger, Thomas (Forschungszentrum Dresden Rossendorf) et al.Abstract: QCD sum rules for chiral partners in the open-charm meson sector are presented at nonzero baryon net density or temperature. We focus on the differences between pseudo-scalar and scalar as well as vector and axial-vector D mesons and derive the […]
  • The impact of chirally odd condensates on the rho meson May 25, 2010
    arXiv:1005.4876Phys.Lett. B709 (2012) 200-206by: Hilger, T. (Forschungszentrum Dresden Rossendorf) et al.Abstract: Based on QCD sum rules we explore the consequences of a pure chiral restoration scenario for the rho meson, where all chiral symmetry breaking condensates are dropped whereas the chirally symmetric condensates remain at their vacuum values. This […]
  • QCD sum rules for D and B mesons in nuclear matter September 28, 2008
    arXiv:0809.4996Phys.Rev. C79 (2009) 025202by: Hilger, T. (Forschungszentrum Dresden Rossendorf) et al.Abstract: QCD sum rules for D and B mesons embedded in cold nuclear matter are evaluated. We quantify the mass splitting of D - D-bar and B - B-bar mesons as a function of the nuclear matter density/ extrapolated to saturation density it is in the order of 6 […]
  • Four-quark condensates in nucleon QCD sum rules April 22, 2007
    arXiv:0704.3004Nucl.Phys. A795 (2007) 19-46by: Thomas, R. (Forschungszentrum Dresden Rossendorf) et al.Abstract: The in-medium behavior of the nucleon spectral density including self-energies is revisited within the framework of QCD sum rules. Special emphasis is given to the density dependence of four-quark condensates. A complete catalog of four-quark cond […]